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	MONITORING VEGETATION GREEN UP USING SATELLITE AND GROUND DATA IN INNER MONGOLIA STEPPE, CHINA
	Li, Jing ; Chen, Xiaoqiu ; Cui, Tiejun ; Huo, Hongyuan
	2016
关键词	green up satellite data ground observation Inner Mongolia bottom-up model PHENOLOGY LANDSAT
英文摘要	Vegetation green up reflects climate impact on landscape, thus monitoring this phenomenon is of crucial importance. This paper develops a bottom-up model to derive green up date using satellite data and ground observations to rebuild green up pattern in Inner Mongolia and analyzes relationships between phenology and climatic factors. The results show that (1) the green up thresholds mostly are at the point where Vegetation Index (VI) begins to increase, and are highly positive correlate with the maxim VI (R-2 = 0.73, Conversion Index=0.243), which means the satellite could effectively obtain green up signals; (2) The bottom-up model which coupled ground observation and satellite data has passed 0.001 significance test; (3) Grass green up spatial pattern changes each year, and temperature and precipitation both influence green up date (P<0.05). Higher temperature and more precipitation in spring lead to earlier green up date, but the mechanism is uncertain in complex meteorological condition.; Tianjin Science and Technology Planning Project [14TXGCCX00015]; CPCI-S(ISTP); 1348-1351
语种	英语
出处	36th IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/459620]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Li, Jing,Chen, Xiaoqiu,Cui, Tiejun,et al. MONITORING VEGETATION GREEN UP USING SATELLITE AND GROUND DATA IN INNER MONGOLIA STEPPE, CHINA. 2016-01-01.

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